WO1998007666A2 - Achromatic lens system for ultraviolet radiation with germanium dioxide glass - Google Patents
Achromatic lens system for ultraviolet radiation with germanium dioxide glass Download PDFInfo
- Publication number
- WO1998007666A2 WO1998007666A2 PCT/EP1997/004468 EP9704468W WO9807666A2 WO 1998007666 A2 WO1998007666 A2 WO 1998007666A2 EP 9704468 W EP9704468 W EP 9704468W WO 9807666 A2 WO9807666 A2 WO 9807666A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- lens
- germanium dioxide
- lens system
- achromatic lens
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/253—Silica-free oxide glass compositions containing germanium
Definitions
- the invention relates to an achromatic lens system for ultraviolet rays according to the preamble of claim 1, a projection exposure system according to claim 4 and a method for producing optical glass from germanium dioxide according to the preamble of claim 8.
- crystalline Ge0 2 is generated by hydrolysis of GeCl 4 , melted and rapidly cooled. This serves as a raw material for grinding as a powdered catalyst material. Secrist and Mackenzie cut off an oxygen plasma with C H50Ge on a cooler surface from the gas phase Ge0 2 and thus produce non-crystalline films.
- Ge0 2 glass bodies that can be used as lens blanks are not known.
- the object of the invention is to provide an achromatic lens with good transmission in the deep ultraviolet (DUV) and a projection exposure system with such an achromatic lens.
- a glass suitable for this in combination with quartz glass is to be provided.
- Germanium dioxide glass in optical quality provides a DUV-transparent material that is not crystalline and therefore shows no polarization effects and is easy to polish and handle. In addition, it has a significantly higher dispersion than quartz glass, so that the larger converging lenses in achromatic can be made from the technologically mature quartz glass and the new material is used in the smaller formats of the diverging lenses.
- Fluorides known for this application (CaF 2 etc., for example US Pat. No. 4,977,426) have only a slightly different, and indeed lower, dispersion and are crystalline, except BeF 2 , which is highly toxic.
- Other crystals such as halides (NaCl etc.) or phosphates have higher dispersion than quartz glass, but have similar disadvantages (eg crystal defects).
- very small lenses made of Ge0 2 can also be used , for example as elements of a honeycomb condenser.
- the stated production method of claim 8 has the advantage that GeCl4 - n is available in a suitable, highly pure form as the industry standard from the production of germanium single crystals.
- a disk as a supporting body can be produced by one of the methods cited or given here.
- Fig. 1 shows an exemplary achromatic lens with quartz glass converging lens and germanium dioxide diverging lens
- Fig. 2 shows schematically a projection exposure system with Ge0 2 glass lenses in lighting and projection lens.
- FIG. 2 shows a DUV projection exposure system in which both in the illumination system 20 and in the
- Projection objective 70 germanium oxide glass lenses 12, 41, 91 are used for achromatization in cooperation with quartz glass lenses 13, 42, 5, 7, 92.
- the laser 11 is usually an excimer laser for the DUV range.
- a mercury vapor lamp for example for the 312.5 nm line, can be provided.
- a beam expanding lens system 12, 13 is achromatized by the choice of the diverging lens 12 made of Ge0 2 and the collecting lens 13 made of quartz glass.
- the honeycomb condenser 14, often used for homogenization, in the example also consists of an array of Ge0 scattering lenses 41 and quartz glass collecting lenses 42. These groups 12, 13; 41, 42 can also have chromatic overcompensation, which then occurs with the further optics 5 in the reticle level 6 results in achromatic illumination.
- the projection objective 70 with the aperture diaphragm 8 and the lens groups 7 and 9 likewise preferably has a GeO 2 diverging lens 91 in the region of small light beam diameters.
- Lens 92 like the other lenses, is made of quartz glass. Further lenses, not shown, from lens groups 5, 7, 8 can consist of Ge0 2 glass and improve achromatization.
- the wafer to be exposed is arranged in the image plane 10.
- Germanium dioxide glass is produced by chemical vapor deposition, in which a combustion plasma of germanium tetrachloride or germanium tetrahydride - both substances available in the semiconductor industry with suitable purity - is deposited with pure oxygen on a carrier plate made of amorphous germanium dioxide.
- the carrier plate can be produced by pressing (sintering) germanium dioxide powder, which was obtained by one of the specified methods from the prior art.
- the same GeO 2 powder is melted in a platinum / Iridiu crucible at 1500 ° C. for about 20 hours and then slowly cooled and removed from the crucible by milling and sawing.
- the Ge ⁇ 2 glass pane with a thickness of up to approx. 3 cm and a diameter of 25 cm and larger is, however, deteriorated in terms of absorption in the DUV due to the transition from the crucible material into the melt.
- the carrier plate can be reused, since the grown layer near the boundary layer to the carrier plate is separated and then the surface can be polished again.
- the Homogeneity of the CUD deposition is ensured in a known manner by rotating and eccentric movements of the carrier plate and suitable heating.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/051,339 US6064516A (en) | 1996-08-16 | 1997-08-15 | Achromatic lens system for ultraviolet radiation with germanium dioxide glass |
DE59703783T DE59703783D1 (en) | 1996-08-16 | 1997-08-15 | ACHROMATIC LENS SYSTEM FOR ULTRAVIOLET RAYS WITH GERMANIUM DIOXIDE GLASS |
JP10510386A JPH11514106A (en) | 1996-08-16 | 1997-08-15 | UV achromatic lens optics containing germanium dioxide glass |
EP97918988A EP0855994B1 (en) | 1996-08-16 | 1997-08-15 | Achromatic lens system for ultraviolet radiation with germanium dioxide glass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19633128A DE19633128A1 (en) | 1996-08-16 | 1996-08-16 | Achromatic lens system for ultraviolet rays with germanium dioxide glass |
DE19633128.5 | 1996-08-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998007666A2 true WO1998007666A2 (en) | 1998-02-26 |
WO1998007666A3 WO1998007666A3 (en) | 1998-05-28 |
Family
ID=7802840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/004468 WO1998007666A2 (en) | 1996-08-16 | 1997-08-15 | Achromatic lens system for ultraviolet radiation with germanium dioxide glass |
Country Status (5)
Country | Link |
---|---|
US (1) | US6064516A (en) |
EP (1) | EP0855994B1 (en) |
JP (1) | JPH11514106A (en) |
DE (2) | DE19633128A1 (en) |
WO (1) | WO1998007666A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19855106A1 (en) * | 1998-11-30 | 2000-05-31 | Zeiss Carl Fa | Illumination system for VUV microlithography |
US7466489B2 (en) * | 2003-12-15 | 2008-12-16 | Susanne Beder | Projection objective having a high aperture and a planar end surface |
KR101200654B1 (en) * | 2003-12-15 | 2012-11-12 | 칼 짜이스 에스엠티 게엠베하 | Projection objective having a high aperture and a planar end surface |
JP5102492B2 (en) | 2003-12-19 | 2012-12-19 | カール・ツァイス・エスエムティー・ゲーエムベーハー | Objective lens for microlithography projection with crystal elements |
WO2006133884A2 (en) | 2005-06-14 | 2006-12-21 | Carl Zeiss Smt Ag | Optical element with an antireflection coating, projection objective, and exposure apparatus comprising such an element |
CN101620317B (en) * | 2008-06-30 | 2011-06-22 | 富士迈半导体精密工业(上海)有限公司 | Laser device with long depth of focus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD211545A1 (en) * | 1982-11-19 | 1984-07-18 | Univ Schiller Jena | METHOD FOR PRODUCING INFRARED LIQUID GLASS |
EP0284414A2 (en) * | 1987-03-27 | 1988-09-28 | Matsushita Electric Industrial Co., Ltd. | Exposure apparatus |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5826050A (en) * | 1981-08-06 | 1983-02-16 | Agency Of Ind Science & Technol | Manufacture of mass of germanium dioxide-diantimony trioxide glass |
-
1996
- 1996-08-16 DE DE19633128A patent/DE19633128A1/en not_active Withdrawn
-
1997
- 1997-08-15 JP JP10510386A patent/JPH11514106A/en not_active Ceased
- 1997-08-15 WO PCT/EP1997/004468 patent/WO1998007666A2/en active IP Right Grant
- 1997-08-15 DE DE59703783T patent/DE59703783D1/en not_active Expired - Fee Related
- 1997-08-15 US US09/051,339 patent/US6064516A/en not_active Expired - Fee Related
- 1997-08-15 EP EP97918988A patent/EP0855994B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD211545A1 (en) * | 1982-11-19 | 1984-07-18 | Univ Schiller Jena | METHOD FOR PRODUCING INFRARED LIQUID GLASS |
EP0284414A2 (en) * | 1987-03-27 | 1988-09-28 | Matsushita Electric Industrial Co., Ltd. | Exposure apparatus |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch, Week 8313 Derwent Publications Ltd., London, GB; Class L01, AN 83-30430K XP002050077 & JP 58 026 050 A (AGENCY OF IND SCI & TECHNOLOGY) , 16.Februar 1983 * |
SHIGEKI SAKAGUCHI: "CONSOLIDATION OF GEO2 SOOT BODY PREPARED BY FLAME HYDROLYSIS REACTION" JOURNAL OF NON-CRYSTALLINE SOLIDS, Bd. 171, Nr. 3, 2.August 1994, Seiten 228-235, XP000486705 * |
Also Published As
Publication number | Publication date |
---|---|
JPH11514106A (en) | 1999-11-30 |
DE59703783D1 (en) | 2001-07-19 |
WO1998007666A3 (en) | 1998-05-28 |
EP0855994B1 (en) | 2001-06-13 |
DE19633128A1 (en) | 1998-02-19 |
US6064516A (en) | 2000-05-16 |
EP0855994A2 (en) | 1998-08-05 |
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